Hello,

We are using InfragisticsWPF4.v15.2.dll  controls where are geting error "IndexOutOfRangeException", Our use case is similar to "https://www.infragistics.com/community/forums/t/108559.aspx", but in this thread we are not geting the details about in which version this issue is fixed.

We even tried upgrading to v16.1, there also we are geting the same issue.

   at Infragistics.Collections.SparseArray.ValidateIndex(Int32 index) in c:\P6Client\Ananke\ThirdParty\Infragistics\src15.2\Windows\Helpers\SparseArray.cs:line 2664
   at Infragistics.Collections.SparseArray.SetItemHelper(Int32 index, Object item, Boolean performingAdd) in c:\P6Client\Ananke\ThirdParty\Infragistics\src15.2\Windows\Helpers\SparseArray.cs:line 2686
   at Infragistics.Windows.DataPresenter.DataRecordsSynchronizer.Process_CollectionChangedWhenAsyncResetPending(Object sender, NotifyCollectionChangedEventArgs e) in c:\P6Client\Ananke\ThirdParty\Infragistics\src15.2\DataPresenter\VirtualData\DataPresenterVirtualData.cs:line 1710
   at System.Collections.ObjectModel.ReadOnlyObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
   at MS.Internal.Data.CollectionViewGroupRoot.AddToSubgroups(Object item, LiveShapingItem lsi, CollectionViewGroupInternal group, Int32 level, Boolean loading)
   at System.Windows.Data.ListCollectionView.PrepareGroups()
   at System.Windows.Data.ListCollectionView.PrepareLocalArray()
   at System.Windows.Data.ListCollectionView.RefreshOverride()
   at System.Windows.Data.CollectionView.RefreshInternal()
   at Primavera.Venus.TSLD.ViewModels.TSLDOptionsViewModel.b__474_0() in C:\P6Client\Ananke\Venus\Primavera.Venus.TSLD\ViewModels\TSLDOptionsViewModel.cs:line 2660
   at System.Windows.Threading.Dispatcher.Invoke(Action callback, DispatcherPriority priority, CancellationToken cancellationToken, TimeSpan timeout)
   at System.Windows.Threading.Dispatcher.Invoke(Action callback)
   at Primavera.Venus.TSLD.ViewModels.TSLDOptionsViewModel.RefreshFilterSource() in C:\P6Client\Ananke\Venus\Primavera.Venus.TSLD\ViewModels\TSLDOptionsViewModel.cs:line 2658
   at Primavera.Venus.TSLD.ViewModels.TSLDOptionsViewModel.FilterDictionary_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e) in C:\P6Client\Ananke\Venus\Primavera.Venus.TSLD\ViewModels\TSLDOptionsViewModel.cs:line 105
   at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
   at Primavera.Venus.TSLD.ViewModels.TSLDOptionsViewModel.d__453.MoveNext() in C:\P6Client\Ananke\Venus\Primavera.Venus.TSLD\ViewModels\TSLDOptionsViewModel.cs:line 2372
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Primavera.Venus.TSLD.ViewModels.TSLDOptionsViewModel.<<-ctor>b__0_0>d.MoveNext() in C:\P6Client\Ananke\Venus\Primavera.Venus.TSLD\ViewModels\TSLDOptionsViewModel.cs:line 67